content/child/threaded_data_provider.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
   6 #define CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/linked_ptr.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/shared_memory.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "ipc/ipc_channel.h"
  15 #include "ipc/message_filter.h"
  16
  17 namespace blink {
  18 class WebThreadedDataReceiver;
  19 }
  20
  21 namespace IPC {
  22 class SyncChannel;
  23 }
  24
  25 namespace content {
  26 class WebThreadImpl;
  27
  28 class ThreadedDataProvider {
  29  public:
  30   ThreadedDataProvider(
  31       int request_id,
  32       blink::WebThreadedDataReceiver* threaded_data_receiver,
  33       linked_ptr<base::SharedMemory> shm_buffer,
  34       int shm_size);
  35   virtual ~ThreadedDataProvider();
  36
  37   void Stop();
  38   void OnReceivedDataOnBackgroundThread(int data_offset,
  39                                         int data_length,
  40                                         int encoded_data_length);
  41
  42   void OnReceivedDataOnForegroundThread(const char* data,
  43                                         int data_length,
  44                                         int encoded_data_length);
  45
  46   void OnResourceMessageFilterAddedMainThread();
  47
  48  private:
  49   void StopOnBackgroundThread();
  50   void OnResourceMessageFilterAddedBackgroundThread();
  51   void ForwardAndACKData(const char* data, int data_length);
  52
  53   scoped_refptr<IPC::MessageFilter> filter_;
  54   int request_id_;
  55   linked_ptr<base::SharedMemory> shm_buffer_;
  56   int shm_size_;
  57   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
  58       background_thread_weak_factory_;
  59   base::WeakPtrFactory<ThreadedDataProvider>
  60       main_thread_weak_factory_;
  61   WebThreadImpl& background_thread_;
  62   IPC::SyncChannel* ipc_channel_;
  63   blink::WebThreadedDataReceiver* threaded_data_receiver_;
  64   bool resource_filter_active_;
  65   base::MessageLoop* main_thread_message_loop_;
  66
  67   struct QueuedSharedMemoryData {
  68     const char* data;
  69     int length;
  70   };
  71   std::vector<QueuedSharedMemoryData> queued_data_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
  74 };
  75
  76 }  // namespace content
  77
  78 #endif  // CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_